Furnace.



No. 786.098. i PATENTED MAR. 28, 1905,

' E. s. CHASE.

' FURNACE.

APPLICATION FILED JULY 14, 1904.

3 SHEETS-SHEET-l.

WITNESSES: nvmvron PATENTED MAR. 28, 1905.

E. S. CHASE.

FURNACE.

APPLICATION FILED JULY 14, 1 904.

3 SHEETS-SHEET. 2.-

WITNESSES: Ji /J? 67mm? ATTO PATENTED MAR. 28, 1905.

E. S. CHASE. FURNACE.

APPLICATION FILED JULY 14, 1904.

3 SHEETSSHEET 3.

N VE N 7019 Z66): C Aase WITNESSES. Q

ATTORNEYS UNITED STATES Patented March 28, 1905.

PATENT OEEicE.

EBEN SIMPSON CHASE, OF SALT LAKE CITY, UTAH, ASSIGNOR TO THE CHASE SMOKELESS FURNACE (10., A CORPORATION OF UTAH.

FURNACE.

SPECIFICATION forming part of Letters Patent No. 786,098, dated March 28, 1905.

Applicati n file Tuly 14,1904. Serial No. 216,523.

To all whom it may concern:

Be it known that I, EBEN SIMrsoN CHASE, a citizen of the United States, and a resident of Salt Lake City, in the county of Salt Lake and State of Utah, have invented a new and Improved Furnace, of which the following is a full, clear, and exact description.

The object of the invention is to provide a new and improved furnace for steam-boilers and the like arranged to insure complete combustion of the burning fuel, to prevent the formation of smoke, and to utilize the burning fuel to the fullest advantage and to keep either one or two fire-boxes in action under the steam-boiler.

The invention consists of novel features and parts and combinations of the same, as will be more fully described hereinafter and then pointed out in the claims.

A practical embodiment of the invention is represented in the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a cross-section of the improvement on the line 1 1 of Fig. 8. Fig. 2 is a sectional plan View of the same on the line 2 2 of Fig. 1. Fig. 3 is a longitudinal sectional elevation of the improvement, and Fig. 4 is a cross-section of part of the same on the line 4 1 of Fig. 3.

The boiler A is mounted in the usual manner in the brickwork B of the furnace, which latter is preferably provided with two fire-boxes C and C, arranged one alongside the other and separated by a longitudinal partition-wall C The fuel-chambers of the fire-boxes have arched roofs or tops C and grates D, below which are located ash-pits E, each connected at its side wall by a channel E and ports E with the upper portion of the corresponding fire-boxes, so that atmospheric air can pass from the ash-pits, by way of the said channels E and ports E to the burning fuel in the fireboxes to aid combustion.

Into each fire-box C or C opens an air-supply pipe E containing a damper E moved automatically into an open position from the corresponding furnace-door E and at the time the door is opened and afresh supply of fuel is thrown through the open door onto the burning fuel in the corresponding firebox C or C. For the purpose mentioned a rod E is pivotally connected with the furnacedoor E and is formed at its free end with an elongated slot E, engaging a crank-arm E on the damper E*. A spring E, held on the rod E (see Fig. 2,) is connected with the crankarm E to hold the damper E* normally closed. Now when the door E is opened the rod E" acts on the crank-arm E to swing the damper E open to admit atmospheric air to the tirebox C or C, according to which fire-box is to be fed with fresh fuel. When the door E' is closed, the damper E remains open, as the crank-arm E travels freely in the slot E Now after the fresh fuel has been burning awhile the damper E is closed by the fireman manipulating the crank-arm E The entrance of the pipes E into the fire-boxes C C may be in front or on the side, as shown.

The bridge-wall F is common to both fireboxes, and in the said bridge-wall is formed an air-supply chamber G, connected at its top by a transverse slot G with a mixing-chamber H in communication with the rear ends of the fire-boxes, the top or roof H of the said mixing-chamber being arched, the arch extending from one side wall of the brickwork B to the other, as plainly indicated in Fig. 1. The arched top H extends partly over the rear ends of the fire-boxes, and on the top of the bridge-wall F, adjacent to the rear ends of the lire-boxes, are arranged vertically-disposed deflectors I, set obliquely, as plainly indicated in Fig. 2, the deflectors in the rear of one fire-box extending, however, in an opposite direction to the deflectors in the other fire-box, said deflectors being used to deflect the products of combustion passing from the fire-boxes into the mixing-chamber H to insure a thorough mixing of the said products of combustion and the air entering through the slot Cr to form an easily-combustible mixture burned in the combustionchamber J, arranged in the rear of the mixing-chamber H and leading to the boiler A.

The channels E extend rearwardly in the plained.

and swirls.

side walls of the brickwork B beyond the fireboxes 0 U, (see Fig. 2,)and the rear ports open into the forward portion of the mixingchamber H opposite the deflectors I to admit air to the smoke and gases as the latter pass over the bridge-wall F.

Between the combustion-chamber and the mixing-chamber H is arranged a V-shaped spreader K, approximately in longitudinal alinement with the partition-wallC to spread the highly-combustible mixture of air and products of combustion during their passage from the mixing-chamber to the combustionchamber. The apex of the spreader K is at the forward end thereof, as plainly indicated in Fig. 2.

Wing-walls L are arranged on the sides of the. brickwork B between the combustionchamber J and the mixing-chamber H, the

said wing-walls being preferably in transverse alinement with the spreader K.

Air is admitted to the air-supply chamber G by suitable ducts Gr arranged in the side wall of the brickwork B, (see Fig. 4,) the said ducts being preferably provided with suitable dampers Gr for admitting more or less air to the air-supply chamber G.

In practice the two fire-boxes C and C are fed alternately, so that the smoke and gases rising in the fire-box from the fuel fed at the time are deflected by the corresponding dcflectors I to the hotter products of combustion coming from the other fire-box, so that a quick mixing of the products of combustion from the two fire-boxes takes place in the mixingchamber, to which air also is supplied to insure complete burning of the mixture in the combustion-chamber and the production of a high heat. If desired, the fire in one fire-box C or C may be dampened, so that only one fire-box is in use at a time. As the arches and H and the deflectors and superheaters I are highly heated, they readily radiate their heat to the gases generated from the freshlyfired fuel to insure a very quick heating of the said gases and a ready burning thereof, especially when mixed with air, as above ex- As the boiler A is located above the arches (I and H, it is evident that the boilershell is not cooled when the fire-boxes are fired, and besides the said shell receives the heat radiated by the said arches G" and H tokeep the shell under uniform temperature.

By having the spreaders K and the wingwalls L arranged as described the velocities and temperatures of the traveling gases are equalized by causing the gases to form eddies The roof or arch H of the mixing-chamber H is somewhat extended over the rear ends of the lire-boxes C C (see Fig. 3) to enlarge the cross-sectional area of the fire-boxes at this point for a ready expansion of the generated gases.

NV hen the furnace is in operation, the de flectors I become red-hot, and consequently act as superheaters for the gases impinged or thrown against the deflectors and of a lower temperature than the deflectors. The division-wall C is extended to the bottom of the ash-pit to render each unit of the grates independent of the other in the matter of draft through the grates.

Having thus described my invention, 1 claim as new and desire to secure by Letters Patent- 1. A furnace comprising a fire-box having a fuel-chamber and an ash-pit connected by channels in the side walls of the fire-box with the fuel-chamber, a bridge-Wall having an airsupply chamber, a mixing-chamber connected by a transverse slot with the top of said airsupply chamber, and deflectors set at angles between the mixing-chamber and the rear end of the fuel-chamber.

2. A furnace comprising a tire-box having a fuel-chamber and an ash-pit connected by channels in the side walls of the fire-box with the fuel-chamber, a bridge-wall having an airsupply chamber, a mixing-chamber above the air-supply chamber and connected by a transverse slot with the top of said air-supply chamber, deflectors set at angles between the mixing-chamber and the rear end of the fuel-chamber, a boiler, and a combustion-cham her in the rearof the mixing-chamber and connected with the flues of the boiler.

3. A furnace comprising a firebox having a fuel-chamber and an ash-pit connected by channels in the side walls of the fire-box with the fuel-chamber, a bridge-wall having an airsupply chamber, a mixing-chamber connected with the said air-supply chamber, deflectors set at angles between the mixing-chamber and .the rear end of the fuel-chamber, a boiler, a

combustion-chamber in the rear of the mixing-chamber and connected with the fines of the boiler, and a spreader between the mixingchamber and the combustion-chamber.

4. A furnace comprising a fire-box having a fuel-chamber and an ash-pit connected by channels in the side walls of the fire-box with the fuel-chamber, a bridge-wall having an airsupply chamber, a mixing chamber connected with the said air-supply chamber, deflectors set at angles between the mixing-chamber and the rear end of the fuel-chamber, a boiler, a combustion-chamber in the rear of the mixingchamber and connected with the fines of the boiler, and a spreader and wing-walls between the mixing chamber and the combustionchamber.

5. A furnace comprising two fire-boxes arranged one alongside the other, a bridge-wall for the saidfire-boxes and provided with an airsupply chamber, a mixing-chamber in communication with the rear ends of both fireboxes and located above the bridge-wall and connected at its bottom by a slot with the said air-supply chamber, the mixing-chamber having an arched roof and deflectors extending from the bridge-wall to the arched roof of the mixing-chamber, the deflectors being arranged between the slot and the rear ends of the fireboxes.

6. A furnace comprising two fire-boxes arranged one alongside the other, a bridge-wall for the said fire-boxes, provided with an airsupply chamber, a mixing-chamber in communication with the rear ends of both fireboxes and located above the bridge-wall and connected at its bottom by a slot with the said air-supply chamber, the mixing-chamber having an arched roof and deflectors extending from the bridge-wall to the arched roof of the mixing-chamber, the deflectors being arranged between the slot and the rear ends of the fireboxes, the deflectors standing obliquely and the deflectors in the rear of one fire-box being arranged in an opposite direction to the deflectors in the rear of the other fire-box.

7. A furnace comprising two fire-boxes arranged one alongside the other, a bridge-wall for the said fire-boxes, provided with an airsupply chamber, a mixing-chamber in communication with the rear ends of both fireboxes and located above the bridge-wall and connected at its bottom by a slot with the said air-supply chamber, the mixing-chamber having an arched roof, deflectors extending from the bridge-wall to the arched roof of the mixing-chamber, the deflectors being arranged between the slot and the rear ends of the fireboxes, the deflectors standing obliquely and. the deflectors in the rear of one fire-box being arranged in an opposite direction to the deflectors in the rear of the other fire-box,a combustion-chamber in the rear of the mixingchamber, and a V-shaped spreader disposed vertically in the middle of the furnace, between the mixing-chamber and the combustion-chamber.

8. A furnace comprising two fire-boxes arranged one alongside the other, abridge-wall for the said fire-boxes, provided with an airsupply chamber, a mixing-chamber in communication with the rear ends of both flreboxes and located above the bridge-wall and connected at its bottom by a slot with the said air-supply chamber, the mixing-chamber having an arched roof, deflectors extending from the bridge-wall to the arched roof of the mixing-chamber, the deflectors being arranged between the slot and the rear ends of the fireboxes, the deflectors standing obliquely and the deflectors in the rear of one fire-box being arranged in an opposite direction to the deflectors in the rear of the other fire-box, a combustion-chamber in the rear of the mixingchamber, a V-shaped spreader disposed vertically in the middle of the furnace, between the mixing chamber and the combustionchamber, and wing-walls at the sides of the furnace, in transverse alinement with the said spreader.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

EBEN SIMPSON CHASE.

Witnesses:

GEO. E. SMITH, H. COHEN. 

